My problem is that the router GUI will not allow me to set the "Internet" Static Gateway IP to 192.168.2.1. It says this is illegal. There is no other GW possible on one IpCop box. If I try to set it up using my ISP's GW it will not allow it.

This is my preffered setup if it were possible, keeping my LAN side isolated from a possible intrusion.

Those that have managed to set it up in this manner, what are your setup numbers?